Question

factorise (x-2)²-16​

Answer 1

Answer:

x-2)²-16. yea Jo hai isko do bar multiply it kr piche 16 likh do ok

Answer 2

Answer:

(x+2)^2 = 20

x^2 + 4x + 4 = 20

x^2 + 4x = 16

x^2 + 4x - 16 = 0

D = b^2 - 4ac,

D = 16 - 4(1)(-16)

D = 16 +64

D = 80

X = [{-b±(D)^1/2}/2a]

X = [{-4±(80)^1/2}/2(1)]

X = [{-4±4(5)^1/2}/2]

X = -2 ± 2(5)^1/2

X = -2[1 + 5^1/2] or X = -2[1 - 5^1/2]